Multi-layer substrate and manufacture method thereof
Disclosed are a multi-layer substrate and a manufacture method thereof. The multi-layer substrate of the present invention comprises a surface dielectric layer and at least one bond pad layer. The surface dielectric layer is located at a surface of the multi-layer substrate. The bond pad layer is embedded in the surface dielectric layer to construct the multi-layer substrate with the surface dielectric layer of the present invention. The manufacture method of the present invention forms at least one bond pad layer on a flat surface of a carrier and then forms the surface dielectric layer to cover the bond pad layer where the bond pad layer is embedded therein. After the multi-layer substrate is separated from the carrier, the bond pad layer and the surface dielectric layer construct a flat surface of the multi-layer substrate.
1. A multi-layer substrate, comprising:
a surface dielectric layer, located at a surface of the multi-layer substrate; and
at least one bond pad layer, embedded in the surface dielectric layer and having a top surface and at least one lateral adjacent to the top surface, wherein the lateral of the bond pad layer bonds with the surface dielectric layer, wherein the surface dielectric layer and the bond pad layer construct the multi-layer substrate, and wherein there is no height difference between adjacent edges of the bond pad layer and the surface dielectric layer.
2. The multi-layer substrate of claim 1 , wherein the top surface of the bond pad layer and a top surface of the surface dielectric layer own a coplanarity.
3. The multi-layer substrate of claim 1 , further comprising a solder mask layer positioned on the top surface of the bond pad layer and the surface dielectric layer, and the solder mask layer has a hole to expose the bond pad layer.
4. The multi-layer substrate of claim 2 , wherein the coplanarity makes the surface of the multi-layer substrate flat for connecting to a device.
5. The multi-layer substrate of claim 4 , wherein the device is a chip device.
6. The multi-layer substrate of claim 4 , wherein the connecting to the device is a Flip-Chip package.